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EP1047051A3 - Light emitting module and compatible optical pickup device adopting the same - Google Patents

Light emitting module and compatible optical pickup device adopting the same Download PDF

Info

Publication number
EP1047051A3
EP1047051A3 EP00303274A EP00303274A EP1047051A3 EP 1047051 A3 EP1047051 A3 EP 1047051A3 EP 00303274 A EP00303274 A EP 00303274A EP 00303274 A EP00303274 A EP 00303274A EP 1047051 A3 EP1047051 A3 EP 1047051A3
Authority
EP
European Patent Office
Prior art keywords
light sources
emitting module
light emitting
light
monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00303274A
Other languages
German (de)
French (fr)
Other versions
EP1047051A2 (en
Inventor
Pyong-Young Seong
Yong-Jae Lee
Byung-Ryul Ryoo
Yong-Ki Son
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1019990013806A external-priority patent/KR20000066585A/en
Priority claimed from KR1019990029279A external-priority patent/KR100585065B1/en
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1047051A2 publication Critical patent/EP1047051A2/en
Publication of EP1047051A3 publication Critical patent/EP1047051A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353Diffractive elements, e.g. holograms or gratings
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/123Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127Lasers; Multiple laser arrays
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13Optical detectors therefor
    • G11B7/131Arrangement of detectors in a multiple array
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356Double or multiple prisms, i.e. having two or more prisms in cooperation
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1362Mirrors
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0903Multi-beam tracking systems
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/22Apparatus or processes for the manufacture of optical heads, e.g. assembly

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

A light emitting module packaging two light sources (61, 63) emitting two light beams of different wavelengths, and a compatible optical pickup device adopting the module are provided. The light emitting module includes a base (51), first and second light sources (61, 63) installed on the base (51), for emitting laser beams in different wavelength regions, a beam splitter (65) and a monitoring photodetector (67) for monitoring the optical outputs of the first and second light sources (61, 63) by receiving the beams emitted from the first and second light sources (61, 63) and split from the beam splitter (65) in one direction. Also, another light emitting module includes a substrate (111), first and second light sources (121, 131) installed on the substrate (111) for emitting laser beams of first and second wavelengths from both lateral sides thereof, a reflection member (115) for reflecting the laser beam emitted from one lateral side of each of the first and second light sources (61, 63) to proceed in one direction, and first and second monitoring photodetectors (125, 135) for monitoring optical outputs of the first and second light sources (121, 131). A compatible optical pickup device includes a light emitting module having one of the above structures, an objective lens for focusing first and second laser beams on an optical recording medium, an optical path converting device, a grating arranged on an optical path between the light emitting module and the optical path converting device for diffracting and transmitting an incident light, and a photodetector.
EP00303274A 1999-04-19 2000-04-18 Light emitting module and compatible optical pickup device adopting the same Withdrawn EP1047051A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1019990013806A KR20000066585A (en) 1999-04-19 1999-04-19 Light emitting module and compatible optical pickup apparatus employing it
KR9913806 1999-04-19
KR9929279 1999-07-20
KR1019990029279A KR100585065B1 (en) 1999-07-20 1999-07-20 Light emitting module and compatible optical pickup apparatus employing it

Publications (2)

Publication Number Publication Date
EP1047051A2 EP1047051A2 (en) 2000-10-25
EP1047051A3 true EP1047051A3 (en) 2001-01-24

Family

ID=26634963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00303274A Withdrawn EP1047051A3 (en) 1999-04-19 2000-04-18 Light emitting module and compatible optical pickup device adopting the same

Country Status (4)

Country Link
US (1) US6587481B1 (en)
EP (1) EP1047051A3 (en)
JP (2) JP2000353332A (en)
CN (2) CN1302474C (en)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3662519B2 (en) 2000-07-13 2005-06-22 シャープ株式会社 Optical pickup
DE60110703T2 (en) * 2000-08-09 2006-05-04 Ricoh Co., Ltd. Optical scanning device with an improved holographic unit and optical disk device containing it
JP3979562B2 (en) * 2000-09-22 2007-09-19 パイオニア株式会社 Optical pickup device
JP2002100068A (en) 2000-09-26 2002-04-05 Pioneer Electronic Corp Optical pickup device
JP3844290B2 (en) 2001-01-24 2006-11-08 シャープ株式会社 Hologram laser and optical pickup
US7092345B2 (en) * 2001-03-22 2006-08-15 Ricoh Company, Ltd. Optical module
JP2003031885A (en) * 2001-07-19 2003-01-31 Toshiba Corp Semiconductor laser device
US20030147331A1 (en) * 2002-02-07 2003-08-07 G-Bond Optoelectronics, Inc. Optical pickup diffracting one of two laser beams to a single detector
JP4121285B2 (en) * 2002-02-18 2008-07-23 株式会社リコー Light source module, light source device, optical scanning device, and image forming apparatus
DE60324859D1 (en) * 2002-06-14 2009-01-08 Samsung Electronics Co Ltd A method of arranging a scanning optical system and an optical recording and / or reproducing apparatus with an optical scanning system arranged according to this method
JP4111816B2 (en) * 2002-12-19 2008-07-02 シャープ株式会社 Semiconductor laser device and optical pickup
JP2004213766A (en) * 2002-12-27 2004-07-29 Toshiba Corp Optical head and optical disk device
KR100509490B1 (en) * 2003-02-21 2005-08-22 삼성전자주식회사 Optical pick-up apparatus and method for controlling phase of 3 beams
KR100529313B1 (en) 2003-04-30 2005-11-17 삼성전자주식회사 Optical module and optical pickup employing it
KR100529315B1 (en) 2003-05-09 2005-11-17 삼성전자주식회사 Light emitting module and optical pickup apparatus adopting the same
DE10323857A1 (en) * 2003-05-26 2005-01-27 Osram Opto Semiconductors Gmbh Housing for a laser diode device, laser diode device and method of manufacturing a laser diode device
JP2005064430A (en) * 2003-08-20 2005-03-10 Toshiba Corp Multiwavelength semiconductor laser
WO2005043291A2 (en) * 2003-10-09 2005-05-12 Kearney Victor P Automated financial transaction due diligence systems and methods
US7808863B2 (en) * 2004-04-26 2010-10-05 Wai-Hon Lee Laser/detector device for optical recording with adjustable detector position
KR100683888B1 (en) 2005-01-20 2007-02-15 삼성전자주식회사 An optical pick-up apparatus
JP4303273B2 (en) * 2006-09-26 2009-07-29 株式会社日立メディアエレクトロニクス Optical pickup
JP2009266328A (en) * 2008-04-28 2009-11-12 Hitachi Media Electoronics Co Ltd Optical pickup
JP5324894B2 (en) * 2008-11-21 2013-10-23 パナソニック株式会社 Semiconductor device and manufacturing method thereof
US9551837B2 (en) * 2011-11-01 2017-01-24 Infineon Technologies Ag Silicon optical line multiplexer devices
CN109586160B (en) * 2017-09-29 2020-10-30 光环科技股份有限公司 High-speed vertical resonant cavity surface emitting laser packaging structure
CN108490632B (en) * 2018-03-12 2020-01-10 Oppo广东移动通信有限公司 Laser projection module, depth camera and electronic device
FR3079623B1 (en) * 2018-03-29 2022-04-08 St Microelectronics Grenoble 2 COVER FOR ELECTRONIC DEVICE AND METHOD OF MANUFACTURING
KR102515833B1 (en) * 2018-08-01 2023-03-29 삼성전자주식회사 Apparatus and method for analyzing substance of object, and image sensor
CN113196597B (en) * 2018-12-17 2024-08-27 ams国际有限公司 Light module including enhanced eye safety features
JP7121289B2 (en) * 2019-02-05 2022-08-18 日本電信電話株式会社 Wavelength selective optical receiver
JP2021190463A (en) 2020-05-26 2021-12-13 日亜化学工業株式会社 Light-emitting device
CN113410760A (en) * 2021-06-16 2021-09-17 成都光创联科技有限公司 Double-chip TO-CAN package
CN115764536A (en) * 2021-06-22 2023-03-07 青岛海信激光显示股份有限公司 Laser device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247167A (en) * 1992-08-06 1993-09-21 International Business Machines Corporation Multiple beam power monitoring system and method with radiation detection and focusing means of overlapping beams
EP0786836A2 (en) * 1996-01-25 1997-07-30 Hewlett-Packard Company Laser-based light source
EP0810589A2 (en) * 1996-05-27 1997-12-03 Sony Corporation Optical pickup device with a plurality of laser couplers
JPH10149559A (en) * 1996-11-19 1998-06-02 Sankyo Seiki Mfg Co Ltd Laser beam emitting device
JPH10172168A (en) * 1996-12-06 1998-06-26 Samsung Electron Co Ltd Optical pickup device
EP0973160A1 (en) * 1998-07-17 2000-01-19 Hoetron, Inc. Wavelength sensitive beam combiner with aberration correction
WO2000004614A1 (en) * 1998-07-14 2000-01-27 Sharp Kabushiki Kaisha Semiconductor laser device

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04199890A (en) * 1990-11-29 1992-07-21 Mitsubishi Electric Corp Semiconductor laser device
JPH05121838A (en) * 1991-10-29 1993-05-18 Nec Corp Semiconductor laser chip carrier and polarized wave synthesis system
JP2908652B2 (en) * 1992-11-25 1999-06-21 株式会社リコー Light scanning light source device
KR940020325A (en) 1993-02-08 1994-09-15 이헌조 Optical pickup device
US5598394A (en) * 1994-05-19 1997-01-28 Sanyo Electric Co., Ltd. Optical pick-up
CN1154541A (en) * 1994-11-11 1997-07-16 大宇电子株式会社 Optical pickup system for use with optical disk having multiple recording surfaces
US5831952A (en) 1995-07-27 1998-11-03 Matsushita Electric Industrial Co., Ltd. Optical disk thickness discriminating apparatus
JP3476989B2 (en) 1995-08-04 2003-12-10 パイオニア株式会社 Optical pickup
US5742575A (en) 1995-08-18 1998-04-21 Sony Corporation Method and device for identifying disc
JPH09172225A (en) * 1995-12-18 1997-06-30 Canon Inc Image recording light source
JP4006032B2 (en) 1995-12-28 2007-11-14 株式会社日立製作所 Objective lens and optical head
JP3691894B2 (en) 1996-02-07 2005-09-07 株式会社東芝 Optical disk device
JPH1011795A (en) * 1996-06-27 1998-01-16 Kenwood Corp Optical pickup
JPH1055561A (en) * 1996-08-08 1998-02-24 Ricoh Co Ltd Optical pickup device
JP3112841B2 (en) * 1996-08-27 2000-11-27 日本電気株式会社 Optical pickup device
TW307007B (en) 1996-09-24 1997-06-01 Ind Tech Res Inst Digital video disc pick-up head
TW350571U (en) 1996-11-23 1999-01-11 Ind Tech Res Inst Optical grille form of optical read head in digital CD-ROM player
JP3653923B2 (en) * 1997-03-19 2005-06-02 ソニー株式会社 Recording / reproducing apparatus and method
TW342493B (en) 1997-04-29 1998-10-11 Ind Tech Res Inst Digital video disc (DVD) optical head with dual-wavelength laser
JP3970380B2 (en) * 1997-05-21 2007-09-05 シャープ株式会社 Semiconductor laser device
TW346687B (en) * 1997-09-15 1998-12-01 Ind Tech Res Inst Package of semiconductor laser diode and compact disk with two-wavelength read/write head
JPH11296893A (en) * 1998-04-14 1999-10-29 Ricoh Co Ltd Optical pickup
JP2000012957A (en) * 1998-06-22 2000-01-14 Nec Corp Multi-wavelength semiconductor laser module
TW411454B (en) * 1998-10-28 2000-11-11 Ind Tech Res Inst Optical read/write head for dual wavelength

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247167A (en) * 1992-08-06 1993-09-21 International Business Machines Corporation Multiple beam power monitoring system and method with radiation detection and focusing means of overlapping beams
EP0786836A2 (en) * 1996-01-25 1997-07-30 Hewlett-Packard Company Laser-based light source
EP0810589A2 (en) * 1996-05-27 1997-12-03 Sony Corporation Optical pickup device with a plurality of laser couplers
JPH10149559A (en) * 1996-11-19 1998-06-02 Sankyo Seiki Mfg Co Ltd Laser beam emitting device
US5978404A (en) * 1996-11-19 1999-11-02 Sankyo Seiki Mfg. Co., Ltd. Laser beam emission apparatus
JPH10172168A (en) * 1996-12-06 1998-06-26 Samsung Electron Co Ltd Optical pickup device
US5995476A (en) * 1996-12-06 1999-11-30 Samsung Electronics Co., Ltd. Optical pick-up apparatus
WO2000004614A1 (en) * 1998-07-14 2000-01-27 Sharp Kabushiki Kaisha Semiconductor laser device
EP0973160A1 (en) * 1998-07-17 2000-01-19 Hoetron, Inc. Wavelength sensitive beam combiner with aberration correction

Also Published As

Publication number Publication date
CN1273415A (en) 2000-11-15
CN1133994C (en) 2004-01-07
US6587481B1 (en) 2003-07-01
JP2002175642A (en) 2002-06-21
JP2000353332A (en) 2000-12-19
EP1047051A2 (en) 2000-10-25
CN1302474C (en) 2007-02-28
CN1516137A (en) 2004-07-28

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